Must-see cartoons for children include: "Peppa Pig", "Peppa Pig", "Ratatouille", "Zootopia", "Super Marines", etc.

1. "Peppa Pig": This cartoon series features a cute pink pig as the protagonist. Through interesting stories and simple life scenes, it conveys the importance of friendship and family to children.

2. "Peppa Pig": This series of cartoons features the cute Piglet Peppa Pig as the protagonist. Through relaxed and interesting stories, it conveys the positive energy of friendship, family and life to children.

3. "Ratatouille": This is a cartoon about food and cooking. Through cute characters and interesting plots, it teaches children cooking skills and the importance of food.

4. "Zootopia": This film tells the story of the cooperation between a rabbit policeman and a fox assistant, revealing the importance of friendship and acceptance of differences.

5. "Power Rangers": This team cartoon is based on technology and tells the story of a group of young people who use their talents and creativity to protect the city from evil forces.